> For the complete documentation index, see [llms.txt](https://gitbook-docs.coinmetrics.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://gitbook-docs.coinmetrics.io/cm-api-spec/timeseries/timeseries-stream/index-levels.md).

# Index levels

Returns a stream of levels for specified indexes.\
If you are falling behind (slow client) you will get `warning` message first, then `error` message and disconnect will happen.

```json
{"openapi":"3.0.2","info":{"title":"Coin Metrics API v4","version":"4.0.0"},"tags":[{"name":"Timeseries stream","description":"WebSocket endpoints for getting a real-time stream of metrics, market data, indexes and other time series data.\n\n**Endpoints on this page:**\n- `GET /timeseries-stream/asset-metrics` — Asset metrics\n- `GET /timeseries-stream/asset-quotes` — Asset quotes\n- `GET /timeseries-stream/index-levels` — Index levels\n- `GET /timeseries-stream/market-candles` — Market candles\n- `GET /timeseries-stream/market-contract-prices` — Market contract prices\n- `GET /timeseries-stream/market-liquidations` — Market liquidations\n- `GET /timeseries-stream/market-openinterest` — Market open interest\n- `GET /timeseries-stream/market-orderbooks` — Market orderbooks\n- `GET /timeseries-stream/market-quotes` — Market quotes\n- `GET /timeseries-stream/market-trades` — Market trades\n- `GET /timeseries-stream/pair-quotes` — Pair quotes"}],"servers":[{"url":"https://api.coinmetrics.io/v4"},{"url":"wss://api.coinmetrics.io/v4"},{"url":"https://community-api.coinmetrics.io/v4"}],"security":[{"api_key":[]}],"components":{"securitySchemes":{"api_key":{"description":"Coin Metrics API key can be specified as `?api_key=` query parameter.","in":"query","name":"api_key","type":"apiKey"}},"parameters":{"StreamingIndexId":{"description":"Comma separated list of indexes.<br/> Use the [/catalog-all-v2/index-levels](#operation/getCatalogAllV2IndexLevels) endpoint for the full list of supported indexes.","in":"query","name":"indexes","required":true,"schema":{"type":"array","items":{"type":"string"}},"explode":false},"IncludeVerification":{"description":"If set to true, includes information about verification.","in":"query","name":"include_verification","required":false,"schema":{"type":"boolean","default":false}},"Backfill":{"description":"What data should be sent upon a connection.<br/> By default the latest values are sent just before real-time data.","in":"query","name":"backfill","schema":{"type":"string","default":"latest","enum":["latest","none"]}},"Pretty":{"description":"Human-readable formatting of JSON responses.","in":"query","name":"pretty","schema":{"type":"boolean","default":false}}},"responses":{"StreamingIndexLevels":{"description":"Index levels WebSocket message.","content":{"application/json":{"schema":{"$ref":"#/components/schemas/StreamingIndexLevel"}}}},"Unauthorized":{"description":"Requested resource requires authorization.","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ErrorResponse"}}}},"Forbidden":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/ErrorResponse"}}},"description":"Requested resource is not available with supplied credentials."},"UriTooLong":{"description":"Provided URI is too long. It must not be greater than 10000 symbols."}},"schemas":{"StreamingIndexLevel":{"allOf":[{"$ref":"#/components/schemas/IndexLevel"},{"type":"object","properties":{"cm_sequence_id":{"$ref":"#/components/schemas/cmSequenceId"}},"required":["cm_sequence_id"]}]},"IndexLevel":{"description":"Information about index level.","properties":{"index":{"$ref":"#/components/schemas/Index"},"time":{"$ref":"#/components/schemas/Time"},"level":{"$ref":"#/components/schemas/IndexLevelValue"},"verification":{"$ref":"#/components/schemas/Verification"}},"type":"object","required":["index","time","level"]},"Index":{"description":"Name of the index.","type":"string"},"Time":{"description":"The time in ISO 8601 date-time format. Always with nanoseconds precision.","type":"string","format":"date-time"},"IndexLevelValue":{"description":"The value of the index.","type":"string","format":"decimal"},"Verification":{"description":"Information about verification.","properties":{"timestamp":{"$ref":"#/components/schemas/VerificationTime"},"level":{"$ref":"#/components/schemas/VerificationIndexLevelValue"},"signature":{"$ref":"#/components/schemas/Signature"}},"type":"object","required":["signature"]},"VerificationTime":{"description":"The verification time of the index.","type":"string","format":"date-time"},"VerificationIndexLevelValue":{"description":"The verification value of the index.","type":"string","format":"decimal"},"Signature":{"description":"The signature information.","type":"string"},"cmSequenceId":{"description":"The monotonically increasing message number, resets on disconnection.","type":"string"},"ErrorResponse":{"properties":{"error":{"$ref":"#/components/schemas/ErrorObject"}},"required":["error"],"type":"object"},"ErrorObject":{"properties":{"type":{"description":"Error type string. Can be used for error identification.","type":"string"},"message":{"description":"Human-friendly error description. Can be amended without prior notification. Do not use for error identification in your code.","type":"string"}},"required":["type","description"],"type":"object"}}},"paths":{"/timeseries-stream/index-levels":{"get":{"summary":"Index levels","description":"Returns a stream of levels for specified indexes.<br/> If you are falling behind (slow client) you will get `warning` message first, then `error` message and disconnect will happen.","operationId":"getTimeseriesStreamIndexLevels","tags":["Timeseries stream"],"parameters":[{"$ref":"#/components/parameters/StreamingIndexId"},{"$ref":"#/components/parameters/IncludeVerification"},{"$ref":"#/components/parameters/Backfill"},{"$ref":"#/components/parameters/Pretty"}],"responses":{"200":{"$ref":"#/components/responses/StreamingIndexLevels"},"401":{"$ref":"#/components/responses/Unauthorized"},"403":{"$ref":"#/components/responses/Forbidden"},"414":{"$ref":"#/components/responses/UriTooLong"}}}}}}
```


---

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